Light induced structural changes in hybrid lead-halide perovskites CH3NH3Pb(IxBr1-x)3

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A controlled investigation of light-induced changes in hybrid perovskites is required to achieve stable operation of tandem solar cells and colour-tuneable light-emitting diodes. Recent reports have observed light-induced shifts in the optical bandgap under illumination with visible light, for which the origin is not understood, but thought to be partially due to halide ion migration. We propose to use muon spectroscopy to explore changes in the local structure of the lead-halide pervoskites, CH3NH3Pb(IxBr1-x)3 on illumination....
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